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asthma pathophysiology

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https://www.readbyqxmd.com/read/28526018/infection-mediated-asthma-etiology-mechanisms-and-treatment-options-with-focus-on-chlamydia-pneumoniae-and-macrolides
#1
REVIEW
Wilmore C Webley, David L Hahn
Asthma is a chronic respiratory disease characterized by reversible airway obstruction and airway hyperresponsiveness to non-specific bronchoconstriction agonists as the primary underlying pathophysiology. The worldwide incidence of asthma has increased dramatically in the last 40 years. According to World Health Organization (WHO) estimates, over 300 million children and adults worldwide currently suffer from this incurable disease and 255,000 die from the disease each year. It is now well accepted that asthma is a heterogeneous syndrome and many clinical subtypes have been described...
May 19, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28523172/roles-of-roflumilast-a-selective-phosphodiesterase-4-inhibitor-in-airway-diseases
#2
REVIEW
Theerasuk Kawamatawong
Asthma and chronic obstructive pulmonary disease (COPD) are common chronic respiratory diseases. Both diseases have incompletely distinct pathophysiology, clinical manifestation, and treatment responsiveness. Pulmonary and systemic inflammations are the hallmarks of COPD. Most asthma responds to inhaled corticosteroid (ICS) treatment. In contrast, COPD is a corticosteroid-resistant disease. Bronchodilators are a preferred treatment method of COPD, with the aim of improving symptoms and preventing exacerbation...
April 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28521083/inflammatory-infiltrate-and-mucosal-remodeling-in-chronic-rhinosinusitis-with-and-without-polyps-structured-histopathologic-analysis
#3
Hannah N Kuhar, Bobby A Tajudeen, Mahboobeh Mahdavinia, Paolo Gattuso, Ritu Ghai, Pete S Batra
BACKGROUND: Chronic rhinosinusitis (CRS) is commonly classified into CRS with nasal polyps (CRSwNP) and CRS without nasal polyps (CRSsNP). Structured histopathologic reporting has the potential to identify salient histologic markers to differentiate subtypes and provide insights into pathophysiologic mechanisms in CRS. METHODS: A structured histopathology report of 13 variables was prospectively employed to analyze ethmoid sinus tissue removed during endoscopic sinus surgery for 99 patients, including 43 CRSsNP and 56 CRSwNP...
May 18, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28506728/-the-effects-of-inhaled-steroids-withdrawal-in-copd
#4
G Jebrak, I Honore, P Serrier, J Dumoulin, P Terrioux, F Soyez, C Maurer, G Mangiapan, M Febvre, L-J Couderc, J-M Braun, T Chinet
The key pathophysiological feature of chronic obstructive pulmonary disease (COPD) is an abnormal inflammatory bronchial reaction after inhalation of toxic substances. The priority is the avoidance of such toxic inhalations, but the use of anti-inflammatory drugs also seems appropriate, especially corticosteroids that are the sole anti-inflammatory drug available for this purpose in France. The risks associated with the prolonged use of these parenteral drugs are well known. Inhalation is therefore the optimal route, but inhaled drugs may also lead to adverse consequences...
May 12, 2017: Revue des Maladies Respiratoires
https://www.readbyqxmd.com/read/28497916/emerging-endotypes-of-chronic-rhinosinusitis-and-its-application-to-precision-medicine
#5
REVIEW
Dae Woo Kim, Seong H Cho
Chronic rhinosinusitis (CRS) is a heterogeneous inflammatory disease with various underlying pathophysiologic mechanisms which translate to endotypes, in contrast to clinical phenotypes or histological subtypes. Defining endotypes can help clinicians predict disease prognosis, select subjects suitable for a specific therapy, and assess risks for comorbid conditions, including asthma. Therefore, with recent advancement of biologicals in CRS clinical trials, endotyping can be a breakthrough in treating recalcitrant CRS...
July 2017: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/28489455/micrornas-profiling-in-asthma-potential-biomarkers-and-therapeutic-targets
#6
Enrico Heffler, Alessandro Allegra, Giovanni Pioggia, Giuseppe Picardi, Caterina Musolino, Sebastiano Gangemi
Asthma is a heterogeneous chronic inflammatory disease in which different endotypes contribute to define clinical-inflammatory phenotypes. MicroRNAs (miRNAs) are a class of small, endogenous 22-25 nt RNA molecules that bind to specific mRNAs to inhibit translation and promote mRNA degradation. miRNAs function in post-transcriptional regulation and control physiological and pathological processes in various diseases. The purpose of this review is to summarize and discuss the current knowledge on the function of miRNAs in asthma, focusing the attention particularly on their biological properties, pathophysiologic roles, and potential use as biomarkers and/or therapies for asthma...
May 10, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28484598/the-evidence-on-tiotropium-bromide-in-asthma-from-the-rationale-to-the-bedside
#7
REVIEW
Dejan Radovanovic, Pierachille Santus, Francesco Blasi, Marco Mantero
Severe and poorly controlled asthma still accounts for a great portion of the patients affected. Disease control and future risk management have been identified by international guidelines as the main goals in patients with asthma. The need for new treatment approaches has led to reconsider anticholinergic drugs as an option for asthma treatment. Tiotropium is the first anticholinergic drug that has been approved for children and adults with poorly controlled asthma and is currently considered as an option for steps 4 and 5 of the Global Initiative for Asthma...
2017: Multidisciplinary Respiratory Medicine
https://www.readbyqxmd.com/read/28484126/mechanisms-underlying-the-pathogenesis-of-hyper-contractility-of-bronchial-smooth-muscle-in-allergic-asthma
#8
Hiroyasu Sakai, Wataru Suto, Yuki Kai, Yoshihiko Chiba
Airway hyperresponsiveness (AHR) and inflammation are key pathophysiological features of asthma. Enhanced contraction of bronchial smooth muscle (BSM) is one of the causes of the AHR. It is thus important for development of asthma therapy to understand the change in the contractile signaling of airway smooth muscle cells associated with the AHR. In addition to the Ca(2+)-mediated phosphorylation of myosin light chain (MLC), contractile agonists also enhance MLC phosphorylation level, Ca(2+)-independently, by inactivating MLC phosphatase (MLCP), called Ca(2+) sensitization of contraction, in smooth muscle cells including airways...
2017: Journal of Smooth Muscle Research, Nihon Heikatsukin Gakkai Kikanshi
https://www.readbyqxmd.com/read/28481637/hydrogen-sulfide-a-novel-player-in-airway-development-pathophysiology-of-respiratory-diseases-and-antiviral-defenses
#9
Nikolay Bazhanov, Maria Ansar, Teodora Ivanciuc, Roberto P Garofalo, Antonella Casola
Hydrogen sulfide (H2S) is a biologically relevant signaling molecule in mammals. Together with the volatile substances nitric oxide (NO) and carbon monoxide (CO), H2S is defined as a gasotransmitter, playing a physiological role in a variety of functions such as synaptic transmission, vascular tone, angiogenesis, inflammation and cellular signaling. The generation of H2S is catalyzed by cystathionine β-synthase (CBS), cystathionine γ-lyase (CSE) and 3 mercaptopyruvate sulfurtransferase (3-MST). The expression of CBS and CSE is tissue-specific with CBS being expressed predominantly in the brain and CSE in peripheral tissues, including lungs...
May 8, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28479329/inflammatory-phenotypes-in-severe-asthma-are-associated-with-distinct-airway-microbiology
#10
Steven L Taylor, Lex E X Leong, Jocelyn M Choo, Steve Wesselingh, Ian A Yang, John W Upham, Paul N Reynolds, Sandra Hodge, Alan L James, Christine Jenkins, Matthew J Peters, Melissa Baraket, Guy B Marks, Peter G Gibson, Jodie L Simpson, Geraint B Rogers
BACKGROUND: Asthma pathophysiology and treatment responsiveness are predicted by inflammatory phenotype. However, the relationship between airway microbiology and asthma phenotype is poorly understood. We aimed to characterise airway microbiota in patients with symptomatic stable asthma, and relate composition to airway inflammatory phenotype and other phenotypic characteristics. METHODS: The microbial composition of induced sputum specimens collected from adult patients screened for a multicenter randomized controlled trial was determined by 16S rRNA gene sequencing...
May 4, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28474507/il-17f-induces-il-6-via-tak1-nf%C3%AE%C2%BAb-pathway-in-airway-smooth-muscle-cells
#11
Masayuki Nakajima, Mio Kawaguchi, Kyoko Ota, Junichi Fujita, Satoshi Matsukura, Shau-Ku Huang, Yuko Morishima, Yukio Ishii, Hiroaki Satoh, Tohru Sakamoto, Nobuyuki Hizawa
INTRODUCTION: Interleukin (IL)-17F plays a critical role in the pathophysiology of asthma. However, the precise role of IL-17F in airway smooth muscle cells (ASMCs) and its regulatory mechanisms remain to be defined. Therefore, we sought to investigate the expression of IL-6 by IL-17F and the involvement of transforming growth factor β-activated kinase 1 (TAK1) and nuclear factor (NF)-κB by in ASMCs. METHODS: ASMCs were cultured in the presence or absence of IL-17F...
June 2017: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/28471517/the-duffy-antigen-receptor-for-chemokines-darc-regulates-asthma-pathophysiology
#12
David G Chapman, Edward B Mougey, Jos L Van der Velden, Karolyn G Lahue, Minara Aliyeva, Nirav Daphtary, Katherine L George, Sidra M Hoffman, Robert W Schneider, Russell P Tracy, George S Worthen, Matthew E Poynter, Stephen P Peters, John J Lima, Yvonne Mw Janssen-Heininger, Charles G Irvin
BACKGROUND: The Duffy Antigen Receptor for Chemokines (DARC) is an atypical receptor that regulates pro-inflammatory cytokines. However, the role of DARC in asthma pathophysiology is unknown. OBJECTIVE: To determine the role of DARC in allergic airways disease in mice, and the association between DARC single nucleotide polymorphisms (SNPs) and clinical outcomes in patients with asthma. METHODS: Mice with targeted disruption of the Darc gene (Darc(∆E2) ) or WT mice were challenged over three weeks with house dust mite (HDM) antigen...
May 4, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28471286/factors-associated-with-adherence-to-asthma-treatment-with-inhaled-corticosteroids-a-cross-sectional-exploratory-study
#13
Moulikatou Adouni Lawani, Frank Zongo, Marie-Claude Breton, Jocelyne Moisan, Jean-Pierre Grégoire, Eileen Dorval, Louis-Philippe Boulet, Frcpc Marie-Sophie Jobin, Line Guénette
BACKGROUND: Understanding factors at the patient, provider or organizational level associated with inhaled corticosteroids (ICS) adherence is important when planning adherence-enhancing interventions. OBJECTIVE: To explore factors associated with adherence to ICS among patients with asthma aged 12 to 45 years. METHODS: A cross-sectional study was conducted among patients with asthma reporting ICS prescription during the baseline interview of an intervention study...
May 4, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28470927/systematic-assessment-of-environmental-risk-factors-for-bipolar-disorder-an-umbrella-review-of-systematic-reviews-and-meta-analyses
#14
REVIEW
Beatrice Bortolato, Cristiano A Köhler, Evangelos Evangelou, Jordi León-Caballero, Marco Solmi, Brendon Stubbs, Lazaros Belbasis, Isabella Pacchiarotti, Lars V Kessing, Michael Berk, Eduard Vieta, André F Carvalho
OBJECTIVES: The pathophysiology of bipolar disorder is likely to involve both genetic and environmental risk factors. In our study, we aimed to perform a systematic search of environmental risk factors for BD. In addition, we assessed possible hints of bias in this literature, and identified risk factors supported by high epidemiological credibility. METHODS: We searched the Pubmed/MEDLINE, EMBASE and PsycInfo databases up to 7 October 2016 to identify systematic reviews and meta-analyses of observational studies that assessed associations between putative environmental risk factors and BD...
May 3, 2017: Bipolar Disorders
https://www.readbyqxmd.com/read/28462210/the-expression-of-proline-specific-enzymes-in-the-human-lung
#15
REVIEW
Gwendolyn Vliegen, Tom K Raju, Dirk Adriaensen, Anne-Marie Lambeir, Ingrid De Meester
The pathophysiology of lung diseases is very complex and proteolytic enzymes may play a role or could be used as biomarkers. In this review, the literature was searched to make an overview of what is known on the expression of the proline-specific peptidases dipeptidyl peptidase (DPP) 4, 8, 9, prolyl oligopeptidase (PREP) and fibroblast activation protein α (FAP) in the healthy and diseased lung. Search terms included asthma, chronic obstructive pulmonary disease (COPD), lung cancer, fibrosis, ischemia reperfusion injury and pneumonia...
March 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28456994/fueling-the-mechanisms-of-asthma-increased-fatty-acid-oxidation-in-inflammatory-immune-cells-may-represent-a-novel-therapeutic-target
#16
Amir A Al-Khami, Mohamed A Ghonim, Luis Del Valle, Salome V Ibba, Liqin Zheng, Kusma Pyakurel, Samuel C Okpechi, Jone Garay, Dorota Wyczechowska, Maria D Sanchez-Pino, Paulo C Rodriguez, Hamid A Boulares, Augusto C Ochoa
BACKGROUND: Increasing evidence has shown the close link between energy metabolism and the differentiation, function, and longevity of immune cells. Chronic inflammatory conditions such as parasitic infections and cancer trigger a metabolic reprogramming from the preferential use of glucose to the up-regulation of fatty acid oxidation (FAO) in myeloid cells, including macrophages and granulocytic and monocytic myeloid-derived suppressor cells. Asthma is another chronic inflammatory condition where macrophages, eosinophils, and polymorphonuclear cells play an important role in its pathophysiology...
April 29, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28453377/investigation-of-the-relationship-between-asthma-and-subclinical-atherosclerosis-by-carotid-femoral-intima-media-and-epicardial-fat-thickness-measurement
#17
Mustafa Yılmaz, Hatice Eylül Bozkurt Yılmaz, Nazan Şen, Cihan Altın, Abdullah Tekin, Haldun Müderrisoğlu
OBJECTIVE: Since asthma and atherosclerosis may share similar pathophysiological mechanism, this study is planned to investigate whether epicardial fat thickness (EFT), carotid and femoral intima media thicknesses, which are markers of subclinical atherosclerosis, are increased in patients with asthma. METHODS: The study was designed as a cross-sectional study. A total of 154 participants (83 patients with asthma and 71 healthy volunteers) were enrolled into the study...
April 28, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28436534/a-novel-trpa1-variant-is-associated-with-carbamazepine-responsive-cramp-fasciculation-syndrome
#18
M J Nirenberg, R Chaouni, T M Biller, R M Gilbert, C Paisán-Ruiz
Cramp-fasciculation syndrome (CFS) is a rare muscle hyperexcitability syndrome that presents with muscle cramps, fasciculations, and stiffness, as well as pain, fatigue, anxiety, hyperreflexia, and paresthesias. Although familial cases have been reported, a genetic etiology has not yet been identified. We performed whole-exome sequencing followed by validation and cosegregation analyses on a father-son pair with CFS. Both subjects manifested other hypersensitivity-hyperexcitability symptoms, including asthma, gastroesophageal reflux, migraine, restless legs syndrome, tremor, cold hyperalgesia, and cardiac conduction defects...
April 24, 2017: Clinical Genetics
https://www.readbyqxmd.com/read/28422351/clinical-phenotypes-in-asthma-during-childhood
#19
Jocelyne Just, Melisande Bourgoin-Heck, Flore Amat
In the 21st century, the heterogeneity of asthma and allergic diseases in childhood will be characterized by multiple phenotypes related to different pathophysiologic pathways or endotypes. From a medical point of view, improved understanding of disease etiology and mechanisms will lead to optimal management including personalized targeted treatment. This article is protected by copyright. All rights reserved.
April 19, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28421631/subclinical-lower-airways-correlates-of-chronic-allergic-and-non-allergic-rhinitis
#20
Ricardo J Saranz, Alejandro Lozano, Natalia A Lozano, Marina F Ponzio, Álvaro A Cruz
The upper and lower airways behave as a physiological and pathophysiological unit. Subclinical lower airways abnormalities have been described in patients with rhinitis without asthma. These are expressed as bronchial hyperreactivity, abnormalities in lung function and bronchial inflammation, likely as a result of the same phenomenon with systemic inflammatory impact that reaches both the nose and the lungs, which for unknown reasons does not always have a full clinical expression. Patients with rhinitis are at increased risk of developing asthma; therefore most authors suggest a careful clinical evaluation and monitoring of these patients, especially if symptoms related to inflammation in the lower airways are observed...
April 19, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
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